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Workshops & seminars

SPECIAL SEMINAR
Tuning Chromaticity by Second-Sphere Coordination of Iridium(III) Complexes
Dr. Barry Blight(University of New Brunswick)

Date & time

Thursday, November 14, 2019
3 p.m. – 4:30 p.m.

Speaker(s)

Dr. Barry Blight

Cost

This event is free

Website

Where

Richard J. Renaud Science Complex
7141 Sherbrooke W. Room SP-365-01

Wheelchair accessible

Yes

ABSTRACT:  Iridium complexes (with various N^C ligands) are undergoing intensive investigation, due to their excellent performance when used as emitters in phosphorescent organic light emitting diodes (PhOLEDs). To fulfil the requirements of full-colour OLED displays, the colour regulation (towards blue, green and red emissions) is highly desirable.1 In this study, we are exploring the colour tuning of different iridium emitters by host- guest assembly with DNA base-pair-like interactions in super strong hydrogen bonded arrays.2 The ideal interactions for holding supramolecular systems together are hydrogen bonds, as they combine relatively strong intermolecular attractions with excellent reversibility. Our findings suggest that this methodology for colour tuning can negate the synthetic manipulation of the ligand structure around iridium,3 which is often costly and time consuming. We are analysing the chromaticity of iridium complexes by simply varying the concentration of compliment-guest,4 while examining the strength of binding and change in the emission properties. This approach focuses on supramolecular chemistry combined with synthesis, which can lead to novel materials with dynamic properties.

References:

  1. A.F. Henwood, E. Zysman-Colman, Chem. Commun. 2017, 53, 807.
  2. B.A. Blight, C.A. Hunter, D.A. Leigh, H. McNab, P.I.T. Thomson, Nature Chemistry, 2011, 3, 246.
  3. B. Balónová, D.  Rota Martir, E.R. Clark, H.J. Shepherd, E. Zysman-Colman, B.A. Blight,  Inorganic Chemistry, 2018, 57, 8581.
  4. B. Balónová, H.J.  Shepherd, C.J. Serpell, B.A. Blight, Supramolecular Chemistry, 2019, DOI: 10.1080/10610278.2019.1649674

BIO:  Associate Professor Barry Blight completed his studies in Canada at Mount Allison University (BSc) and Western University (PhD) in Supramolecular Chemistry. He held a Marie Curie (IIF) Fellowship at the University of Edinburgh with Prof David Leigh studying molecular machines and hydrogen bonding materials, followed by an NSERC PDF in Canada at Queen’s University with Prof Suning Wang studying emissive boron-containing coordination complexes. Barry’s first academic appointment was a Lectureship (Assistant Professor) at the University of Kent (2013) in the School of Physical Sciences in Canterbury, UK. He then moved to the Department of Chemistry at the University of New Brunswick (2017) in Canada.

Dr. Blight is the guest of Dr. Ashlee Howarth

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